Ottawa: TransCanada Corp said on Wednesday planned maintenance at Cushing, Oklahoma is over on the 700,000 barrel-per-day Gulf Coast leg of its Keystone oil pipeline. “Everything went back into operation earlier this morning,” the company said in an email. TransCanada declined to discuss daily flow rates.Oil market intelligence firm Genscape earlier reported that flow resumed to near 476,000 bpd in the Gulf Coast Keystone pipeline on Wednesday.The company said on Monday it was performing planned maintenance on the pipeline. The Gulf Coast Project is a 487-mile (780-kilometer), 36-inch crude oil pipeline beginning in Cushing and extending south to Nederland, Texas, according to the company website